CN103011391B - MBR (Membrane Bioreactor) method and device for microbial immobilization - Google Patents

MBR (Membrane Bioreactor) method and device for microbial immobilization Download PDF

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Publication number
CN103011391B
CN103011391B CN201210504785.7A CN201210504785A CN103011391B CN 103011391 B CN103011391 B CN 103011391B CN 201210504785 A CN201210504785 A CN 201210504785A CN 103011391 B CN103011391 B CN 103011391B
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membrane
microbial
mbr
carrier
water
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CN201210504785.7A
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CN103011391A (en
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陈福泰
杨艳
郝福锦
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北京清大国华环境股份有限公司
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage

Abstract

The invention provides a microbial immobilization MBR (Membrane Bioreactor) device and a use method thereof. The device mainly comprises a water feeding pump, a membrane pool, a membrane component, a microbial immobilization carrier, a water generation pump, a fan and the like. A microbial immobilization technique is combined with a membrane bioreactor, so that the biological species of the reactor are enriched, microorganisms are subjected to proliferation on the carrier, the sludge concentration is reduced, and the membrane pollution is slowed down; and through the washing function of the carrier to the membrane surface, uninterrupted physical cleaning is carried out, and the period of chemical washing is prolonged. The operation energy consumption is low, the membrane pollution degree is reduced, and the initial investment of equipment is reduced; and the device is simple in structure, small in occupied space and simple to operate, and is convenient in automation operation and operation control.

Description

A kind of method and apparatus of microbial immobilized MBR
Technical field
The invention belongs to environmental technology field, especially relate to a kind of method and apparatus of microbial immobilized MBR.
Background technology
The sewage treatment technique organically combining with biotechnology as membrance separation, membrane bioreactor (MBR) is due to it Effluent quality good stable, plant area area is little to wait remarkable advantage so as in municipal sewage and Industrial Wastewater Treatment and reuse Aspect becomes the very competitive selection of one kind, and is highly valued in the world.As a kind of efficient water process skill Art, MBR is in development and improves the stage, and its own still suffers from certain defect needs to solve further.At present, operation energy consumption high and Membrane pollution problem is the Main Bottleneck limiting MBR engineer applied.
Control membrane fouling mainly to be realized in terms of membrane module property, mud mixed liquid property and operating condition three.Mud The improvement of mixed liquor characteristicses can lessening membrane fouling to a certain extent, the method improving mixed liquor characteristicses is as in mud mixed liquid Add flocculant, activated carbon or filler etc..
Immobilized microorganism technique is using being either physically or chemically defined in certain space region by free microorganism activity Domain, and make it keep method that is active, recycling.Immobilized microorganism is conducive to the life of the slow microorganism of growth rate Long, it is possible to decrease toxicant is to biological impact, energy efficient process high concentration, difficult degradation, high toxicity organic wastewater and high ammonia nitrogen Waste water, the particularly nondegradable organic pollution of traditional biological method.Immobilized microorganism can reduce suspended biological in mixed liquor Concentration.
Utility model patent CN200820234088.3 disclose a kind of microbial immobilized film bioreactor device and Its advanced waste treatment apparatus constituting.This device include immobilized microorganism-film bioreactor device, pretreatment unit, Nanofiltration membrane treatment device and decontaminating apparatuss.Wherein immobilized microorganism-film bioreactor device include at least Part I and Part II, Part I includes the immobilized microorganism biochemistry pool that bottom is provided with multiple aeration heads, arranges in described biochemistry pool Multiple compartments, described compartment include being arranged on above aeration head and pool inner water position below at least two-layer intercept between net and net Conjunction type fixed microorganism carrier, is provided with ultrafiltration membrane treatment system in described Part II.This patent by immobilization technology with Membrane bioreactor is applied in combination, and using the mode that splits, high energy consumption, floor space is big.
Utility model CN201020195926.8 discloses a kind of fixed film bioreactor, including anaerobic reactor, Cube filler, aerobic reactor, apertured partition, hollow-fibre membrane.Cube filler is placed, anaerobism is anti-inside anaerobic reactor Answer and in device, add anaerobe;Aerobic reactor by apertured partition, cube filler is fixed under aerobic reactor Portion, adds aerobic microbiological in aerobic reactor, hollow-fibre membrane, doughnut are fixed in the apertured partition top of aerobic reactor Film upper end connects suction pump and is connected with outlet pipe, and air compressor machine connects aeration tube;The water inlet of anaerobic reactor lower end passes through centrifugation Pump is connected with raw water box, and the outlet of anaerobic reactor upper end is connected with the water inlet of aerobic reactor lower end.This patent is good In oxygen reactor, hollow fiber film assembly and cube filler subregion are placed, and structure of reactor is complicated, and high cost is it is impossible to abundant body The advantage that existing immobilized microorganism is combined with MBR.
Content of the invention
It is contemplated that at least solving one of above-mentioned technical problem.
Immobilization technology is combined by the present invention with membrane bioreactor, adds microorganism and fix in membrane bioreactor Change carrier, the addition of microbial fixed carrier enriches the biological species of MBR, improve the disposal ability of reactor and stablize Property, on the surface of microbial fixed carrier and be internally formed aerobic layer, transition zone and anaerobic layer, microbial fixed carrier Upper distinctive metazoa and anaerobic bacteria enhance the decomposition to hardly degraded organic substance;Occur inside microbial fixed carrier Anaerobic denitrifying bacteria nitrate reduction is become nitrite and nitrogen, promote the decomposition of ammonia nitrogen;When reactor do not add micro- MLSS value stabilization during biological fixing carrier, adds the microorganism thereon of microbial fixed carrier postadhesion constantly to grow, increase Grow, suspended biological is suppressed because foodstuff competes, cause MLSS value to reduce, alleviate the pollution of membrane module;Micro- life used Thing fixation support in the presence of aeration, washable film surface, further reduce fouling membrane, reduce Chemical cleaning number of times, fall Low operating cost.
It is an object of the present invention to proposing a kind of microbial immobilized MBR device.This device includes successively:Membrane cisterna, Membrane module, microbial fixed carrier, produce water control valve, produce water pump, produce water ga(u)ge, produce water regulating valve, vacuum meter, blower fan, Aerating regulation valve, gas flowmeter, liquid level controller, exhaust-valve, intake pump and purging system composition;Described microbial immobilized Carrier is placed in membrane cisterna;Described membrane module includes membrane component, aeration tube, collector pipe, and described membrane component is located at institute at each interval State in membrane module, define water purification space and each described membrane component water purification space in each described membrane component and pass through with collector pipe Pipeline connection, described aeration tube is located at the lower section of membrane module, is described membrane component supply;Described purging system includes cleaning control Valve, dosing funnel, dosing pump and spray tank.
The device of this invention be mainly used in sewage disposal it is preferable that for high-concentration hardly-degradable waste water, high ammonia-nitrogen wastewater, The process of heavy metal wastewater thereby.Add microbial fixed carrier in membrane bioreactor, immobilized microorganism is to noxious substance Ability to bear and degradation capability be remarkably reinforced, this is because, microbial fixed carrier to microorganism one kind protection Effect, microbial fixed carrier can produce inhibition to the contamination of Organic substance so that the actual dirt of antimicrobial surface Dye thing concentration reduces, and toxicity reduces.Microorganism, after immobilization, establishes certain between microbial fixed carrier and microorganism Plant and physically or chemically contact, increased disposal ability and the stability of reactor.
Another object of the present invention is to proposing the side that a kind of use mentioned microorganism immobilization MBR device processes sewage Method, this process comprises the steps:
(1) waste water is squeezed in membrane cisterna through intake pump, mixes laggard with the activated sludge in membrane cisterna, microbial fixed carrier Enter membrane module;Controlled the start-stop of intake pump by liquid level sensor, start during low liquid level to intake, during high level, stop water inlet.Work as liquid When position reaches protection liquid level, system is out of service;
(2) mud mixed liquid, microbial fixed carrier is made to be evenly distributed to membrane module by the aeration effect of aeration tube Interior, the air that the bubbles entrain microbial fixed carrier of aeration generation carries out continuous effective to membrane component washes away and cleans;
(3) collector pipe of membrane module through vacuum pump aspirate water outlet, swabbing pressure is monitored by vacuum meter, swabbing pressure be 1~ 100kPa, permeant flux is in 1~100L/ (m2·h);
(4) when permeant flux is reduced to the 80% of design flux, close vacuum pump, open dosing pump, membrane component is soaked Bubble cleaning, opens vacuum pump and discharges medicinal liquid after soaking 4~6h.
The present invention compared with prior art has advantages below and salience effect:
(1) living species of reactor are enriched, in the presence of microbial fixed carrier, generation time in reactor Longer antibacterial breeds on microbial fixed carrier in a large number, distinctive metazoa and anaerobism on microbial fixed carrier Antibacterial enhances the decomposition to hardly degraded organic substance;
(2) anaerobic denitrifying bacteria occurring inside microbial fixed carrier becomes nitrite and nitrogen nitrate reduction Gas, promotes the decomposition of ammonia nitrogen;
(3) the MLSS value stabilization when reactor does not add microbial fixed carrier, attached after addition microbial fixed carrier The microorganism thereon constantly grows, breeds, and suspended biological is suppressed because foodstuff competes, and causes MLSS value to reduce, alleviates The pollution of membrane module;
(4) due to the crown_interception of film, decrease the loss of free flora, promote microorganism in microbial fixed carrier Upper propagation;
(5) microbial fixed carrier is in the presence of aeration, washable film surface, reduces fouling membrane further, reduces Chemical cleaning number of times, reduces operating cost.Preferably, described film is Flat Membrane.
Energy consumption of the present invention is low, fouling membrane mild degree, and equipment investment expense is few, and apparatus structure is simple, and floor space is little, operation Succinctly, it is easy to automatic operation control.
Brief description
The above-mentioned and/or additional aspect of the present invention and advantage will become from reference to the description to embodiment for the accompanying drawings below Substantially and easy to understand, wherein:
Fig. 1 is the schematic diagram of microbial immobilized MBR device according to embodiments of the present invention;
1. membrane cisterna 2. membrane module 3. microbial fixed carrier 4. produces water control valve 5. and produces water pump 6. product water ga(u)ge 7. produce water regulating valve 8. vacuum meter, 9. blower fan, 10. aerating regulation valve, 11. gas flowmeter, 12. liquid level controller 13. row Empty valve 14. purge control valve, 15. dosing funnel, 16. dosing pump, 17. spray tank 18. intake pump 2A. membrane component 2B. exposes Trachea 2C. collector pipe 2D. bubble.
Specific embodiment
Embodiments of the invention are described below in detail, the example of described embodiment is shown in the drawings, wherein from start to finish The element that same or similar label represents same or similar element or has same or like function.Below with reference to attached The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention it is to be understood that term " " center ", " longitudinal ", " horizontal ", " on ", D score, The orientation of instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward " or position relationship are Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or dark Show the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that right The restriction of the present invention.Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint are relative Importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be bright Show or implicitly include one or more this feature.In describing the invention, unless otherwise stated, the containing of " multiple " Justice is two or more.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or is integrally connected;Can To be to be mechanically connected or electrical connection;Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, Ke Yishi The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition Concrete meaning in invention.
As shown in figure 1, waste water is squeezed in membrane cisterna 1 through intake pump 18, after mixing, pass through membrane element with the activated sludge in membrane cisterna Space between part 2A enters membrane module 2;Controlled the start-stop of intake pump 18 by liquid level controller 12, start during low liquid level to intake, Stop water inlet during high level.When liquid level reaches protection liquid level, system is out of service, and protection liquid level is located under low liquid level, film The top of assembly collector pipe;Blower fan 9 supplies to aeration tube 2B, under aeration effect, mud mixed liquid and microbial immobilized load Body is evenly distributed in membrane module 2, and the air carrying out continuous effective to membrane component 2A washes away and cleans, the collector pipe of membrane module 2 2C, through producing water pump 5 suction water outlet, when producing water, produces water control valve 4 and opens, purge control valve 14 is closed;Suction is monitored by vacuum meter 8 Pressure, swabbing pressure is -1~-100kPa, and permeant flux is in 1~100L/ (m2·h);When permeant flux is reduced to design flux 80% when, close produce water pump 5, open dosing pump 16, the medicinal liquid that dosing pump 16 will be stored in spray tank 17, leaked by dosing Rely on gravity to enter membrane component 2A through collector pipe 2C overflow after bucket 15, to membrane component 2A soaking and washing, open after soaking 4~6h and produce Medicinal liquid is discharged by water pump 6.
In some embodiments of the invention, membrane component can using Flat Membrane, hollow-fibre membrane, tubular membrane it is preferable that Membrane component selects Flat Membrane, and microbial fixed carrier effectively can be washed away to flat membrane component under the drive of bubble, Carry out physical cleaning, improve antifouling property.
Microbial fixed carrier in microbial immobilized MBR according to embodiments of the present invention, its form can be honeybee Nest is spongy, spherical, lamellar, strip;Preferably, using honeycomb sponge shape.Material used by microbial fixed carrier is permissible It is can also to be organically inorganic it is preferred that material therefor is polyurethane elastomer.
Example 1
Coal chemical industrial waste water processing item, treating capacity 500m3/ d, raw water COD400-800mg/L, ammonia nitrogen 180-240mg/L, SS 150-200mg/L.After microbial immobilized Membrane Bioreactor for Wastewater Treatment, water outlet COD20-50mg/L, ammonia nitrogen<5mg/L, SS<1mg/L.Operation energy consumption is 0.75kW h/m3, the cleaning frequency was promoted to 130 days by 90 days, and cleaning cost reduces by 25%.
Example 2
Tobacco wastewater is processed and Recycling Project, and treating capacity is 200m3/ d, raw water CODcr is 600~1800mg/L, and BOD is 130~400mg/L, SS are 250~500mg/L.After microbial immobilized Membrane Bioreactor for Wastewater Treatment, water outlet CODcr is less than 50mg/L, turbidity is less than 1NTU.This system operation one month, transmembrane pressure (TMP) rises to 5.6kPa by 2.7kPa, in mould difference Rise steadily, stable.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or the spy describing with reference to this embodiment or example Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not Necessarily refer to identical embodiment or example.And, the specific features of description, structure, material or feature can be any One or more embodiments or example in combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that:Not Multiple changes, modification, replacement and modification can be carried out to these embodiments in the case of the principle of the disengaging present invention and objective, this The scope of invention is limited by claim and its equivalent.

Claims (7)

1. a kind of microbial immobilized MBR processes the method for waste water it is characterised in that the method comprises the steps:
(1) waste water is squeezed in membrane cisterna through intake pump, enters film with the activated sludge in membrane cisterna, microbial fixed carrier after mixing Assembly;Controlled the start-stop of intake pump by liquid level sensor, start during low liquid level to intake, stop water inlet during high level, when liquid level arrives When reaching protection liquid level, system is out of service;
(2) mud mixed liquid, described microbial fixed carrier is made to be evenly distributed to membrane module by the aeration effect of aeration tube Interior, in reactor, longer antibacterial breeds on described microbial fixed carrier in a large number generation time, and described microorganism is fixed Change distinctive metazoa and anaerobic bacteria on carrier and enhance the decomposition to hardly degraded organic substance;Described microbial immobilized load The anaerobic denitrifying bacteria that internal portion occurs becomes nitrite and nitrogen nitrate reduction, promotes the decomposition of ammonia nitrogen;Add The microorganism thereon of described microbial fixed carrier postadhesion constantly grows, breeds, suspended biological quilt because foodstuff competes Suppression, causes MLSS value to reduce, alleviates the pollution of membrane module;Additionally, the microorganism described in bubbles entrain that aeration produces is fixed The air that change carrier carries out continuous effective to membrane component washes away and cleans;
(3) collector pipe of membrane module through vacuum pump aspirate water outlet, swabbing pressure is monitored by vacuum meter, swabbing pressure be 1~ 100kPa, permeant flux is in 1~100L/ (m2·h);
(4) when permeant flux is reduced to the 80% of design flux, close vacuum pump, open dosing pump, membrane component is soaked clear Wash, open vacuum pump after soaking 4~6h and medicinal liquid is discharged.
2. a kind of microbial immobilized MBR according to claim 1 processes the method for waste water it is characterised in that described micro- Biological fixing carrier, in the presence of aeration, cleans film surface, reduces fouling membrane.
3. a kind of device of microbial immobilized MBR, this device includes successively:Membrane cisterna (1), membrane module (2), microbial immobilized Carrier (3), product water control valve (4), product water pump (5), product water ga(u)ge (6), product water regulating valve (7), vacuum meter (8), blower fan (9), aerating regulation valve (10), gas flowmeter (11), liquid level controller (12), exhaust-valve (13), intake pump (18) and cleaning System forms;Described microbial fixed carrier (3) is placed in membrane cisterna (1), is used for making to be attached to described microbial immobilized load Microorganism on body constantly grows, breeds, and suspended biological is suppressed because foodstuff competes, and causes MLSS value to reduce, alleviates The pollution of membrane module;Described membrane module (2) includes membrane component (2A), aeration tube (2B), collector pipe (2C), and described membrane component is each other Compartment of terrain is located in described membrane module, defines water purification space and each described membrane component water purification space in each described membrane component Pass through pipeline connection with collector pipe, described aeration tube is located at the lower section of membrane module, be described membrane component supply, the gas that aeration produces Bubble drives the air that described microbial fixed carrier carries out continuous effective to membrane component to wash away and clean;Described purging system bag Include purge control valve (14), dosing funnel (15), dosing pump (16) and spray tank (17).
4. a kind of microbial immobilized MBR device according to claim 3 is it is characterised in that described membrane component is using flat Plate film, hollow-fibre membrane or tubular membrane.
5. a kind of microbial immobilized MBR device according to claim 3 is it is characterised in that micro- life in described membrane cisterna Thing fixation support, its form is honeycomb sponge shape, spherical, lamellar or strip.
6. a kind of microbial immobilized MBR device according to claim 3 is it is characterised in that micro- life in described membrane cisterna The material of thing fixation support is polyurethane elastomer.
7. a kind of microbial immobilized MBR device according to claim 3 is it is characterised in that micro- life in described membrane cisterna The size of thing fixation support is less than 5mm for external diameter.
CN201210504785.7A 2012-12-03 2012-12-03 MBR (Membrane Bioreactor) method and device for microbial immobilization CN103011391B (en)

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CN103435147A (en) * 2013-07-23 2013-12-11 天津工业大学 Self-cleaning submerged tubular membrane bioreactor
CN103708606B (en) * 2013-12-31 2017-11-17 北京清大国华环境股份有限公司 A kind of pulse energy saving formula MBR method and apparatus
CN104016549A (en) * 2014-06-21 2014-09-03 郭会 Immobilized activated sludge and MBR (Master Boot Record) co-construction sewage treatment tank
CN104163495A (en) * 2014-09-05 2014-11-26 苏州乐盛环保技术有限公司 Method for processing COD wastewater based on SCMBR tubular flat membrane set
CN104724834B (en) * 2015-03-18 2017-01-04 中国科学院南京土壤研究所 Periphyton processing system is utilized to remove method and the equipment thereof of copper in the sewage of source, face
CN105967321A (en) * 2016-07-18 2016-09-28 广德清源水处理设备有限公司 Immobilized microorganism ball applied to water treatment of membrane component and use method
CN108911136A (en) * 2018-07-17 2018-11-30 厦门理工学院 A kind of processing method of heavy metal wastewater thereby

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